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This Music City Motorplex Division will compete under
the sanctions of NASCAR. The specifications listed will
become part of the official NASCAR rulebook, except in
cases of obvious conflict. All technical rules will
generally fall within NASCAR and Music City Motorplex
specifications. NASCAR officials will resolve any
disputes. All drivers in this division must be members
of NASCAR and Music City Motorplex to compete.
NOTICE:
All equipment is subject to
the approval of
NASCAR officials. No equipment will be considered
as having been approved by reason of having passed
through inspection unobserved. Any equipment which does
not conform to specifications or tolerances contained in
this NASCAR rulebook, will not be eligible for approval.
NOTE:
All cars must comply with
the rules set forth by the Music City Motorplex rule
book to be eligible for competition.
Any and all cars and car parts are subject to MCM
technical inspection processes.
MCM is not required to follow any other
sanctioning bodies or manufactures guidelines in its
inspection processes.
1.
WHEELBASE
1.1
Minimum wheelbase is 108 inches (+ or – 3/8
inches)
2.
BODY and APPEARANCE
2.1
Legal body is the ARP extended cab truck body,
following the manufacturer specific guidelines and
measurements.
All trucks must be stock appearing.
Body panels must be stock appearing
with no holes, vents or etc.
2.2
Headlight and tail light decals are mandatory.
2.3
Complete bodies, fenders, bumpers and trunks in
proper configuration of the model and year required.
2.4
No lightweight or carbon fiber (Kevlar) parts
allowed.
2.5
All trucks must be bilateral symmetrical.
Body must be on centerline of the distance
between the outer edge of the tires, front and rear,
within two (2)
inches.
2.6
The width of the top roll of all quarter panels
must remain symmetrical to truck and not alter the rear
window configuration or measurements.
2.7
Roll must follow produced angles and not be
flattened.
2.8
Extended length quarter panels not allowed.
2.9
All window openings must remain stock size and
configuration,
2.10
Rear bumper cover may be rubber or plastic.
2.11
Pickup bed top panel cover must be removable.
2.12
Engine firewall must remain of standard design.
Must be steel and completely welded and sealed.
2.13
No offsets or 180-degree style firewalls allowed.
2.14
Minimum thickness .024 steel floors, in standard
position, must be complete and completely sealed.
2.15
For exhaust systems only, the floor area on the
right side of the seat may be raised, with welded steel
panels, a maximum if ten (10) inches to the top of
drive shaft tunnel and extend to the
right door panel.
2.16
Drive shaft tunnel maximum width twelve (12)
inches, height ten (10) inches.
2.17
Interior area of the truck must be completely
enclosed from the front and rear fire walls of not less
than 24 gauge (0.025) magnetic sheet steel.
2.18
Tires may not protrude more than two (2) inches
beyond outer edge of the body.
2.19
No bubble fenders.
2.20
Additional added aerodynamic devices, movable
skirts or barriers to modify airflow beneath, below or
around the truck will not be permitted.
2.21
Nose piece of all configurations (body style)
shall be stock in appearance and manufactures’
dimensions.
Allowed will be a three (3) inch piece of
plastic, metal or aluminum to be
attached to the nose to protect the nose and not change
the configuration.
The four (4) inch height remains the same.
2.22
The lower nose air dam below front bumper must be
only at the manufactures’ produced angle.
2.23
Nose air dam may not protrude further than
manufactures’ specifications.
2.24
Radiator opening blocking allowed provided it
does not change dimension or appearance.
2.25
No wings; no vertical airfoil stabilizers.
2.26
Rear spoiler must be mounted in normal position
centered between the two rear frame rails.
This means no forward verticals, side boards,
gussets and
wraparounds at ends.
2.27
Spoilers must be single plane only, not to exceed
six (6) inches at highest point.
2.28
Maximum width of rear spoiler is sixty (60)
inches; maximum height from ground is forty-five and a
half (45.5) inches.
2.29
Jacking post may not protrude outside body.
2.30
Hood must be secured by hood pins, minimum of six
(6).
2.31
Beds on back of truck must be ¾ inch maximum
within the center of the rear of the cab.
Front to rear of bed.
2.32
Fenders on all four corners of truck must not
exceed two (2) inches past the outside of the tire.
This includes the bottom of the front spoiler.
2.33
Nose height (ride height) may be measured at any
point of the nose, all parts of the nose must meet
minimum specifications.
3.
WINDSHIELD
3.1
Super Trucks must have a full, clear front and
rear windshield of .063” minimum Lexan with a minimum of
two (2) windshield braces.
3.2
Length, size, angle and area of front windshield
must be of stock size, position, angle and
configuration.
3.3
No tinting of any windows.
4.
ENGINE LOCATION
4.1
General Motors engines must be located so that
the center of the #1 spark plug hole of the engine block
on the left side is in line with the centerline of the
front spindle.
4.2
Ford and Chrysler engines must be located so that
the forward edge of the right side cylinder head is in
line with the centerline of the right spindle.
4.3
Center of the crankshaft must be within .5” of
the centerline of the frame rails.
4.4
A minimum height of eleven (11) inches from
center of crankshaft to ground must be maintained at all
times.
4.5
Engine options:
A.
Music
City Motorplex approved
and sealed crate motors.
Crate Engines must meet Manufacturer’s
Specifications, including timing and valves.
B.
Approved Super Truck “machined” V8 engines.
C.
Approved Late Model “machined” V8 engines.
5.
ENGINE GROUND CLEARANCE
5.1
Minimum height of eleven (11) inches from the
centerline of the crankshaft to the ground must be
maintained.
6.
ENGINE DISPLACEMENT
6.1
Ford and GM engine displacement with permissible
overborne is limited to 358 cid.
6.2
Chrysler maximum is 365.116 cid.
6.3
Bore x Bore x 7854 x Stroke x Number of Cylinders
Equals cubic inch displacement.
7.
ENGINE BLOCK
7.1
Must be standard factory production with standard
external measurements in all respects.
7.2
No plastic or aluminum blocks.
8.
ENGINE PISTON and RODS
8.1
Any flat top piston may be used.
8.2
Piston deck must be below top of block.
8.3
Only steel connecting rods permitted, no titanium
or stainless steel connecting rods.
9.
OIL PANS and OIL SYSTEMS
9.1
No dry sump systems allowed.
9.2
Altered oil pans with increased capacity allowed.
9.3
Oil coolers are optional.
9.4
Oil pump must be in stock location.
9.5
No external pumps.
9.6
Oil pan access hole minimum 3/4” for connecting
rod inspection must be provided.
10.
CRANKSHAFT and BALANCER
10.1
Only standard magnetic steel or cast iron
production design crankshafts allowed.
10.2
Stroke may not be increased or decreased:
GM 3.480; Ford 3.500; Mopar 3.578
10.3
Balancing permitted.
10.4
Counterweights must be the same shape, may be
polished.
10.5
No scalloped-edge, knife-edged, undercut or
drilled to lighten the crankshaft.
10.6
Only standard OBM magnetic steel elastomer-type
harmonic balancers allowed.
10.7
When weighing crankshafts, the weight shall
include the timing chain sprocket.
10.8
Minimum weight of crankshaft is fifty (50)
pounds.
(see weight section 35)
11.
CYLINDER HEADS
11.1
All cylinder heads are subject to approval.
11.2
Cylinder heads must be completely cast iron.
11.3
Intake and exhaust ports must be in the original
“as cast” configuration.
11.4
Must be straight plug cast steel.
11.5
No bowtie, 461, 461x, VORTEC or L31 heads
allowed.
11.6
Cylinder heads must be an approved stock OEM
produced, cast iron, two valves per cylinder.
11.7
All cylinder heads are limited to a minimum 62 cc
combustion chamber for each cylinder.
11.8
The combustion chamber may be machine cut beside
the valves only to equalize the chamber cc.
11.9
Any other machining or grinding will not be
permitted.
11.10
Head must have heat riser passage.
11.11
Angle cutting of the head to block mating surface
will not be permitted.
11.12
Any flow work, sanding, polishing, relieving,
grinding, porting, treating, abrasive blasting, port
matching, alterations or the addition of material or
coatings to the ports or combustion
chambers will cause the heads to be declared illegal.
11.13
All valves must be identical in appearance and
construction as an OEM style valve.
Air directional devices will not be allowed.
The valve stems must
11.14
have a minimum diameter of 11/32 inch.
The valve stem diameter may be undercut to a
minimum diameter of 0.302 inch in the area of the valve
stem form the head of the valve to the bottom of the
valve guide.
Hollow valve stems will not be permitted.
The maximum valve sizes as
measured across the face of the valve are as follows:
A.
GM:2.020 intake / 1.625 exhaust
B.
Cleveland 2bbl: 2.046 intake / 1.655 exhaust
C.
Cleveland 4bbl: 1.290 intake / 1.709 exhaust
D.
Ford N351: 2.020 intake / 1.600 exhaust
E.
Mopar W2: 2.020 intake / 1.655 exhaust
11.14
The head stud or bolt holes may not be offset or
drilled off-center for the purpose of moving the head in
any direction.
11.15
A maximum of three (3) valve seat angles plus the
bowl cut will be permitted.
When cutting the valve seal angles, stone or
grinding will not be
permitted above the bottom of the
valve guide.
All cutting in reference to the valve job and
bowl area must be centered off the centerline of the
valve guide.
Radius cuts will not be permitted.
Upon completion of the valve job, the bowl area
above the valve seat to the bottom of the valve guide
must still be the same configuration as far as shape and
finish as it was from the manufacture.
Surfaces and/or edges where the cutter of stone
has touched must not be polished.
Hand grinding or polishing will not be permitted
on any of the head.
11.16
Any style magnetic steel valve springs are
permitted.
11.17
Titanium retainers only allowed.
11.18
No titanium valves or springs.
11.19
Guides must remain in original position.
11.20
No titanium parts allowed anywhere.
11.21
Cleveland
style head modification allowed is one water access hole
may be drilled in front of each head.
12.
INTAKE MANIFOLD
12.1
The intake manifold must be MCM approved with the
manufactures’ identification in the form of cast-in part
numbers unaltered on the intake manifold.
12.2
Track officials may use an intake manifold
provided by the respective manufacturer as a guide in
determining whether a competitor’s intake manifold
conforms to the specifications of
the rule book.
12.3
Intake manifolds must remain as manufactured.
12.4
Port matching or flow work will not be permitted.
12.5
Intake manifolds must not be painted or coated.
12.6
Only one (1) standard flat gasket, a maximum
compressed thickness of 0.075 inch, may be used between
the cylinder head and the intake manifold.
12.7
Intake manifolds allowed:
A.
GM: #7530 Weiand or Edelbrock Victor Jr #2975
B.
Ford: Edelbrock #2665 or #2750 or #2980 or Weiand
Xcelerator #7515
C.
Mopar: Edelbrock Victor W2 or Weiand Xcelerator
#7545
12.8
Only one (1) standard flat gasket may be used
between the head and the intake manifold.
12.9
Maximum gasket thickness .075 inch (compressed).
12.10
No wedge type gaskets allowed.
12.11
No metal or Bakelite spacers.
12.12
The intake manifold material must be aluminum.
12.13
Magnesium or other exotic materials will not be
permitted.
13.
CAMSHAFT, VALVE LIFTERS and ROCKERS
13.1
Any flat tappet cam will be allowed.
13.2
No roller cams, no hard faced overlay cams.
13.3
No automatic cam timing devices allowed.
13.4
Camshaft bearings must remain stock type babbit
(no roller).
13.5
Only steel hydraulic or solid steel lifters are
permitted.
No roller or mushroom type lifters permitted.
13.6
Lifters must be the same size and shape as
original equipment per manufacture.
13.7
Shaft rockers not allowed except approved Mopar
engines.
14.
COMPRESSION
14.1
Compression ratio is defined as the difference
between actual cylinder volume at B.D.C and T.D.C which
will be determined by volume gauge and
whistler.
15.
EXHAUST
15.1
All competing trucks must have a working exhaust
system that meets a maximum of 100dba at 100 feet under
racing conditions.
No exceptions.
15.2
Exhaust may exit under truck with turndown or
baffle.
15.3
One (1) inch maximum overhang past vehicle.
15.4
Headers with a 1 ¾” OD maximum with maximum four
(4) inch steel pipe exhaust allowed.
15.5
Firewall may not be altered for exhaust (refer to
2.15).
15.6
Under chassis or crossover types allowed.
15.7
No stainless steel headers or collectors.
15.8
Custom, one of a kind or homemade headers must be
approved.
15.9
No 180, step type, over-the-top, reversion,
anti-reversion or venturi multi size.
15.10
No merged tubes from side to side, no velocity or
cone style collectors.
15.11
No ceramic or metal bearing paints allowed
internally.
15.12
All exhaust tubing: Four (4) inch OD maximum.
15.13
Mufflers are required, recommended mufflers are
Schoenfeld #112530 or #113035. However muffler price
must not exceed $175.
Muffler may not be altered internally.
15.14
Exhaust pipes will be allowed to exit through the
door.
However if car does not meet specific noise
requirements, a muffler will be required.
15.15
All Super Trucks will be permitted a 5/16 header
flange max with no spacer of any kind between the head
or flange.
15.16
Exhaust gasket may not exceed .090 compressed.
16.
CARBURETOR
16.1
See Section 9 for complete carburetor guidelines.
17.
CARBURETOR SPACERS, GASKETS and MOUNTING
17.1
Adapter plate must be made of metal only.
17.2
Carburetor gasket, maximum
of .060”,
must be pliable paper gasket material.
17.3 One
(1) inch maximum spacer allowed between air cleaner
bottom and carburetor for linkage clearance issue only.
17.4
Recommended minimum of two (2) return springs
(opposing each other).
17.5
Throttle stops highly recommended.
17.6
Machined Engines only a 1 piece, solid, aluminum
carburetor spacer, a minimum 0.700 inch, maximum 0.750
inch in thickness, must be installed
between intake manifold and carburetor.
The spacer must be centered on the intake
manifold and have two (2) round holes with one and
one-half (1 ½”) inch openings located in the center that
match the base of the carburetor. Holes must be cut
perpendicular with the base of the carburetor.
Taper, bevels, or any modifications will not be
permitted.
17.7
Crate Motors carb spacer #CV156 only, no
modifications of any kind permitted.
18.
AIR INTAKE
18.1 Round,
dry paper type air cleaner element maintaining a minimum
1 ½”, maximum 4” high and a minimum 12”, maximum 14”
allowed.
18.2
No chemical treatment to element.
18.3 Only
round metal air filter housing will be permitted. The
top and bottom of the air filter housing must be solid
and must be the same diameter. Lips or
expanded edges will not
be permitted.
18.4 The
center stud hole in the top of the air filter housing
cannot be recessed more than one (1) inch.
18.5 The
air filter housing must be centered and set level on the
carburetor.
18.6 The
bottom of the air filter housing must be lower than the
top of the carburetor choke horn.
18.7 No ram
air, ducts, baffles, or air dividers will not be
permitted on or leading to the air cleaner or element.
18.8 Fresh
air opening of any type will not be permitted in the
hood or cowl area.
18.9
Tubes, funnels or
any device which may control the flow of air will not be
permitted inside of the air cleaner of between the air
filter housing and carburetor.
18.10
No vacuum in crankcase allowed.
19.
FUEL SYSTEMS
19.1
Fuel
system installation, consult the 2008 NASCAR Whelen All
American Rule Book.
19.2
All
fuel used for competition must be purchased through
Music City Motorplex.
19.3
No
oxygen bearing or performance enhancing additives may be
introduced into the inductions or fuel supply, either at
the fuel cell or upstream in the system.
19.4 Stock
type mechanical fuel pump only, mounted in stock
location, no electric pumps.
19.5 Only
one fuel line, maximum ½” ID allowed. Additional lines,
operating or not, will result in disqualification.
19.6 No
additional fuel reservoir or pressure equalizing systems
19.7 Fuel
filters must be on suction side of fuel pump if used.
19.8 No
cool cans, icers or fuel cooling devices allowed.
19.9 Dry
coupling fuel connectors optional. Fueling also by
opening the rear deck lid.
20.
ELECTRICAL SYSTEMS
20.1
12-volt systems only.
20.2
Battery must be
completely enclosed in a steel box located forward of
rear axle.
20.3
Approved battery powered stock type distributors
only.
20.4
No magnetos, crank trigger, multiple coil or
programmable Ignition systems allowed.
20.5
One single ignition box permitted.
20.6
Ignition amplifier must have a 6 pin female
connector attached to its output leads (MSD part #8170)
to facilitate manual operation and testing of ignition
components during inspection.
20.7
Ignition firing order must remain as produced.
20.8
Starters must be in original stock position with
stock mounts and hardware and operable.
20.9
No traction control devices of any type allowed.
All offenders will be banned from all competition for a
period not less than 5 years.
20.10
ON/OFF Master switch must be clearly marked and
easily accessible to track safety crew.
20.11 The on/off switch must be
wired to the battery cable in a manner that would cut
off all electrical power.
21.
COOLING SYSTEMS
21.1
Any metal or aluminum production radiator allowed
in stock location not requiring any body modification.
21.2
No plastic radiators.
21.3
Fan must have a shroud covering 180 degrees of
top circumference subject to inspection.
21.4
Approved radiator overflow tube must exit to
either right side of windshield at cowl or into a
permanently installed
metal catch can,
mounted ahead of fire
21.5
Stock
steel factory type production fan, with a minimum of
four blades, is optional.
21.6
Electric cooling fans, located on backside of
radiator are allowed.
21.7
No shrouds or panels on rear side of radiator.
21.8
Water pump must be stock type in stock location.
21.9
Antifreeze is not allowed.
22.
CLUTCH
22.1
Magnetic steel, multiple disc clutch assembly
allowed, 5½” minimum diameter is required.
22.2
Starter flywheel ring gear must remain the same
size as standard production ring gear.
22.3
Bell
housing must be a 360-degree blow proof housing with a
2” inspection hole in bottom of housing.
23.
TRANSMISSION
23.1
Standard stock production model OEM manual
transmission allowed.
23.2
Minimum of 3, maximum of 4 operable forward gears
and reverse.
23.3
All gears must be in working order (except first
gear in 4- speeds).
23.4
No straight cut gears. No lightning of gears on
main shaft.
23.5
Single, stock style shifter required.
23.6
Transmission “Quick Change” units not allowed.
24.
DIFFERENTIAL
24.1
“Quick Change” or 9" Ford original configured
rear ends allowed.
24.2 Full
floating rear ends are compulsory.
24.3 Rear
axle load tubes, axle shafts, and snouts must be steel.
24.4 No
offset rear ends.
24.5 Axle
tubes must be within 1’ of each other in length.
24.6 No
“gold-trac” or “triple trac” types allowed.
24.7 No
external coolers or pumps permitted
24.8 No
cambered axles.
25.
DRIVERLINE
25.1
Rear wheel drive configurations only.
25.2
Two 360-degree drive shaft straps mandatory,
installed fore and aft of drive shaft. Installation must
beapproved by tech staff.
25.3
Standard
production, one-piece steel drive shafts only. Diameter
of 2 ¾ or 3”“ OD.
25.4
Drive shaft must be
painted white.
26.
BRAKES
26.1
Brakes must be operational on all four wheels.
26.2
Conventional, hydraulic type brake system,
non-ABS type, non-traction control.
26.3
Four wheel disc brakes optional.
26.4
After-market steel brake rotors acceptable.
26.5
No floating brake rotors.
26.6
Stock type steel, single puck caliper.
26.7
No brake fluid re-circulators.
26.8
No in-line brake devices (lock resistant brake
systems)
27.
FRAMES
27.1
NO holes may be cut in frame rails to lighten the
frame rails.
27.2
A tubular steel frame, per specifications in the
2007 NASCAR Whelen All American Series rule book is
allowed.
27.3
Fab frames must follow stock stub specifications
with modifications permitted are clearance for the
following:
oil pan, fuel pump, headers,
steering shaft, and springs. Installations of sway bar,
motor mounts, upper A frame mounts and weight-jacking
bolts will be permitted. Any other modifications must be
approved. When incorporating side frame rails into front
frame section, frame rail must be installed in the same
location as if Super Trucks had a factory-installed
frame. The distance from the inside edge of the frame
rails, left and right, must be within 1” of the
centerline of the tread width front and rear.
27.4
A
minimum ground clearance of 5” (with driver) must be
maintained on any part of the frame and body with a 4”
clearance on body and front nosepiece
required.
Frame rails must be parallel and be constructed
with minimum 2”x3” steel square tubing with a minimum
wall thickness of .083” (0.095 recommended).
27.5
The front frame and rear kick-ups must be similar
in design and configurations to standard passenger kick
ups and must meet
safety specifications of
technical inspector. Frame rails must extend over rear
axle.
28.
ROLL BARS
28.1
Consult 2007 NASCAR Whelen All American Series Late
Model Stock Car rule book for detailed specifications.
28.2 Driver
is responsible for installation, construction and
workmanship of roll cage.
28.3 Round
steel 1 ¾“x .090 roll bars are compulsory and must be
approved. D.O.M. tubing is encouraged.
28.4
Aluminum and/or other soft metals not permitted.
28.5 Roll
bars must be welded.
28.6
All trucks are
required to have a rear vertical hoop behind the
driver’s head connected to left and right front roll bar
legs by a roof hoop. The front roll bar legs
must follow the contour of the windshield post
and cowl and must attach. The rear vertical hoop must be
attached at a 90-degree angle to
frame rail and
be supported by a diagonal bar from top left to
bottom right, or top right to bottom left.
28.7
A
roll bar must connect the left and right of the rear
vertical hoop at seat height.
28.8
An
“X” must connect left and right frame rail. An
additional roll bar must be installed across the
bottom of the dashboard, extending from the left
front roll
bar leg to the right front roll bar leg. Rear
support bars, left and right, must extend from the top
of the rear vertical hoop to the rear of the frame in
the
rear.
29.9
The
front leg bars and rear vertical hoop must be connected
with 4 horizontal door bars from the left side
29.10
Right side must have at least 4 door bars.
29.11
The door bars on the left side must be convex in shape
and spaced from top to bottom as equally as space
permits.
29.11 Top
left door bar must be a minimum of 29” to top measured
from ground and a minimum of 23 inches on the right
side.
29.12
Door bars must have six (6) vertical studs equally
spaced.
29.13
Two angular studs must be attached from bottom door bar
to main frame rail.
29.14
Center of seat located 18” from closest door bar.
29.15
Front wedge bar, roof wedge bar, transmission hoop and
front hoop are required.
29.16
“Petty” and “Earnhardt” bars are highly recommended.
29.17
Butt welds, joints, and connections must have gusset
plates for reinforcement.
29.18
Roll bars must be padded from top of frame on left side
to center of top.
29.19
High-density padding strongly recommended.
29.20
Top
roll bar and hoop must follow contour of roof as closely
as possible. Roof hoop at sides of side window opening
must be tight to roof as closely as possible.
29.21
Door bar deflector plates, which
must be welded to roll cage, are recommended.
29.
SUSPENSION
29.1
Front-end suspension must be reinforced for safety.
29.2
Heavy-duty spindles and bearings are compulsory.
29.3 Heim
joints permitted on upper A frames.
29.4
Adjustable upper A frames permitted.
29.5 Lower
A frames must have a stock appearance for the type front
sub-frame being used and mounted in stock location.
29.6
Both
A frames must be the same length (no offsets allowed).
29.7
Fabricated
Lower A Frames: Ford type must be constructed using
minimum two 2” wide by one 1” high steel tubing.
29.8
General
Motors type must be constructed using a minimum one 1”
wide by 2” high steel tubing.
29.9
Rear spring position may be changed, but both springs
must be located either inside or outside of frame rails.
29.10
Either rear coils or transverse springs will be
permitted.
29.11
Approved truck trailing arms permitted when using rear
coil spring suspension.
29.12
Trailing arm mounting may not be adjustable front to
rear.
29.13
Attachment point of trailing arms may be steel bearing
or rubber bushing.
29.14
All trailing arms and bars must be steel and approved
with a minimum wall thickness 1/8”
29.15
All trailing arms and wrap up bars must be single piece
solid type (heim’s, bushing, etc.)
29.16
No shock or spring set ups will be permitted in these
areas.
29.17
Trailing arms, panard bar, and wrap up bar using heim
joints must be aircraft quality.
29.18
All springs front and rear must be a minimum of 5”
outside diameter.
29.19
Only all-steel body racing shocks are allowed.
29.20
All shocks may be revalvable but may be claimed for
$175.00 each by a competitor finishing behind the
claimee after event.
29.21
External adjusting devices,
cockpit adjusting devices or remote pressure units not
allowed.
29.22
No device, mechanical or
electrical for shifting weight will be permitted inside
driver’s compartment.
29.23
No hydraulic weight shifting
devices allowed.
30.
SPINDLES / HUBS
30.1
Stock hub and
rotors or steel hub with after-market steel rotor
optional.
30.2
Wheel adapters are allowed.
30.3
Aluminum 5x5 or wide 5 hubs allowed. No
magnesium.
30.4
Approved cast, forged, steel after-market
spindles allowed.
31.
STEERING
31.1
Tie rods, drag links, and component parts must be steel
and heavy duty.
31.2 Heim
joints will be permitted on steering
linkage, but must be aircraft quality.
31.3 Rack
and pinion or slider steering not permitted.
31.4 An
approved quick release steering coupling on steering
wheel is mandatory.
31.5 A lock
collar on front side of helm joint of steering rod is
mandatory.
31.6
Collapsible steering shafts are recommended.
31.7 Finger
/ hand protection is recommended.
31.8 Quick
release steering wheel system with steering wheel nose
guard or center pad is required.
32.
GROUND CLEARANCE
32.1
Frame rails 5” minimum.
32.2 All
body components 4-inch minimum.
32.3 Fuel
cell 8” minimum clearance
33.
WHEELS
33.1
Maximum 10" wheel - maximum measurement inside bead to
bead. May be reinforced.
33.2 All
wheels must be same width and offset.
33.3
Nonferrous wheels
made by riveting or bolting components or any type
assembly are not allowed.
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